Headphone A has an impedance of 300Ω and a sensitivity of 85dB/mW. While it solely wants 1mW at zero.55Vrms to succeed in a snug listening quantity of 85dB, to be able to improve the level in your hifi setup you’d must pump 10mW at 1.73Vrms to succeed in 95dB. That’s plenty of juice, and not one thing your smartphone can really do. Given that a smartphone can’t output that type of power, you’re going to need to use an amp with headphone A.
John Hilliard, Robert Stephens and John F. Blackburn were a part of the group that developed the Shearer Horn, with Lansing Manufacturing producing the 285 compression driver and the 15XS bass driver. Lansing Manufacturing was the only one promoting them as Shearer Horns. In 1936, the Shearer Horn acquired the Academy Scientific and Technical Award from the Academy of Motion Picture Arts and Sciences. Here are 15 … Read More